
2004 GMC Envoy SLE 4.2L MIL Lamp on
Over the past year or so this Envoy (which belongs to the office manager) has a problem where the PCM sets P1133 about twice a month or less. The problem is intermittent and always seems to run fine. However, the lights get rythmically dim then bright for 10 s...
FIX posted 1/30/2011
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Message Closed w/FIX
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VIN | 1GKDT13S04 |
Engine | 4.2 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | Fuel Injection |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Intermittently |
Trouble Codes
P0136 | Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Malfunction |
P1133 | Heated Oxygen Sensor (Bank 1 Sensor 1) Insufficient Switching |
Message Closed w/FIX
Vehicle Data
2004 GMC Envoy SLE
VIN | 1GKDT13S04 |
Engine | 4.2 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | Fuel Injection |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Intermittently |
Trouble Codes
P0136 | Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Malfunction |
P1133 | Heated Oxygen Sensor (Bank 1 Sensor 1) Insufficient Switching |